/* * ocp.h * * (c) Benjamin Herrenschmidt (benh@kernel.crashing.org) * Mipsys - France * * Derived from work (c) Armin Kuster akuster@pacbell.net * * Additional support and port to 2.6 LDM/sysfs by * Matt Porter <mporter@kernel.crashing.org> * Copyright 2003-2004 MontaVista Software, Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * TODO: - Add get/put interface & fixup locking to provide same API for * 2.4 and 2.5 * - Rework PM callbacks */ #ifdef __KERNEL__ #ifndef __OCP_H__ #define __OCP_H__ #include <linux/init.h> #include <linux/list.h> #include <linux/device.h> #include <asm/mmu.h> #include <asm/ocp_ids.h> #include <asm/rwsem.h> #include <asm/semaphore.h> #ifdef CONFIG_PPC_OCP #define OCP_MAX_IRQS 7 #define MAX_EMACS 4 #define OCP_IRQ_NA -1 /* used when ocp device does not have an irq */ #define OCP_IRQ_MUL -2 /* used for ocp devices with multiply irqs */ #define OCP_NULL_TYPE -1 /* used to mark end of list */ #define OCP_CPM_NA 0 /* No Clock or Power Management avaliable */ #define OCP_PADDR_NA 0 /* No MMIO registers */ #define OCP_ANY_ID (~0) #define OCP_ANY_INDEX -1 extern struct list_head ocp_devices; extern struct rw_semaphore ocp_devices_sem; struct ocp_device_id { unsigned int vendor, function; /* Vendor and function ID or OCP_ANY_ID */ unsigned long driver_data; /* Data private to the driver */ }; /* * Static definition of an OCP device. * * @vendor: Vendor code. It is _STRONGLY_ discouraged to use * the vendor code as a way to match a unique device, * though I kept that possibility open, you should * really define different function codes for different * device types * @function: This is the function code for this device. * @index: This index is used for mapping the Nth function of a * given core. This is typically used for cross-driver * matching, like looking for a given MAL or ZMII from * an EMAC or for getting to the proper set of DCRs. * Indices are no longer magically calculated based on * structure ordering, they have to be actually coded * into the ocp_def to avoid any possible confusion * I _STRONGLY_ (again ? wow !) encourage anybody relying * on index mapping to encode the "target" index in an * associated structure pointed to by "additions", see * how it's done for the EMAC driver. * @paddr: Device physical address (may not mean anything...) * @irq: Interrupt line for this device (TODO: think about making * an array with this) * @pm: Currently, contains the bitmask in CPMFR DCR for the device * @additions: Optionally points to a function specific structure * providing additional informations for a given device * instance. It's currently used by the EMAC driver for MAL * channel & ZMII port mapping among others. * @show: Optionally points to a function specific structure * providing a sysfs show routine for additions fields. */ struct ocp_def { unsigned int vendor; unsigned int function; int index; phys_addr_t paddr; int irq; unsigned long pm; void *additions; void (*show)(struct device *); }; /* Struct for a given device instance */ struct ocp_device { struct list_head link; char name[80]; /* device name */ struct ocp_def *def; /* device definition */ void *drvdata; /* driver data for this device */ struct ocp_driver *driver; u32 current_state; /* Current operating state. In ACPI-speak, this is D0-D3, D0 being fully functional, and D3 being off. */ struct device dev; }; struct ocp_driver { struct list_head node; char *name; const struct ocp_device_id *id_table; /* NULL if wants all devices */ int (*probe) (struct ocp_device *dev); /* New device inserted */ void (*remove) (struct ocp_device *dev); /* Device removed (NULL if not a hot-plug capable driver) */ int (*suspend) (struct ocp_device *dev, pm_message_t state); /* Device suspended */ int (*resume) (struct ocp_device *dev); /* Device woken up */ struct device_driver driver; }; #define to_ocp_dev(n) container_of(n, struct ocp_device, dev) #define to_ocp_drv(n) container_of(n, struct ocp_driver, driver) /* Similar to the helpers above, these manipulate per-ocp_dev * driver-specific data. Currently stored as ocp_dev::ocpdev, * a void pointer, but it is not present on older kernels. */ static inline void * ocp_get_drvdata(struct ocp_device *pdev) { return pdev->drvdata; } static inline void ocp_set_drvdata(struct ocp_device *pdev, void *data) { pdev->drvdata = data; } #if defined (CONFIG_PM) /* * This is right for the IBM 405 and 440 but will need to be * generalized if the OCP stuff gets used on other processors. */ static inline void ocp_force_power_off(struct ocp_device *odev) { mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) | odev->def->pm); } static inline void ocp_force_power_on(struct ocp_device *odev) { mtdcr(DCRN_CPMFR, mfdcr(DCRN_CPMFR) & ~odev->def->pm); } #else #define ocp_force_power_off(x) (void)(x) #define ocp_force_power_on(x) (void)(x) #endif /* Register/Unregister an OCP driver */ extern int ocp_register_driver(struct ocp_driver *drv); extern void ocp_unregister_driver(struct ocp_driver *drv); /* Build list of devices */ extern int ocp_early_init(void) __init; /* Find a device by index */ extern struct ocp_device *ocp_find_device(unsigned int vendor, unsigned int function, int index); /* Get a def by index */ extern struct ocp_def *ocp_get_one_device(unsigned int vendor, unsigned int function, int index); /* Add a device by index */ extern int ocp_add_one_device(struct ocp_def *def); /* Remove a device by index */ extern int ocp_remove_one_device(unsigned int vendor, unsigned int function, int index); /* Iterate over devices and execute a routine */ extern void ocp_for_each_device(void(*callback)(struct ocp_device *, void *arg), void *arg); /* Sysfs support */ #define OCP_SYSFS_ADDTL(type, format, name, field) \ static ssize_t \ show_##name##_##field(struct device *dev, struct device_attribute *attr, char *buf) \ { \ struct ocp_device *odev = to_ocp_dev(dev); \ type *add = odev->def->additions; \ \ return sprintf(buf, format, add->field); \ } \ static DEVICE_ATTR(name##_##field, S_IRUGO, show_##name##_##field, NULL); #ifdef CONFIG_IBM_OCP #include <asm/ibm_ocp.h> #endif #endif /* CONFIG_PPC_OCP */ #endif /* __OCP_H__ */ #endif /* __KERNEL__ */